Prevent repeat events

blink1073 · blink1073 · commit ee155c78e35f · 2015-01-23T08:44:03.000-06:00
diff --git a/lib/matplotlib/backends/web_backend/mpl.js b/lib/matplotlib/backends/web_backend/mpl.js
@@ -80,6 +80,8 @@ mpl.figure = function(figure_id, websocket, ondownload, parent_element) {
     this.ws.onmessage = this._make_on_message_function(this);
 
     this.ondownload = ondownload;
+
+    this._key = null;
 }
 
 mpl.figure.prototype._init_header = function() {
@@ -463,6 +465,16 @@ mpl.figure.prototype.mouse_event = function(event, name) {
 }
 
 mpl.figure.prototype.key_event = function(event, name) {
+    // prevent repeat events
+    if (name == 'key_press')
+        if (event.keyCode === this._key) {
+            return;
+        } else {
+            this._key = event.keyCode;
+        }
+    }
+    if (name == 'key_release')
+        this._key = null;
 
     var value = '';
     if (event.ctrlKey && event.keyCode != 17) {
